What was the name of the 1950s McDonald's service slogan printed beneath the Speedee logo?

The 1950s McDonald's service slogan printed beneath the Speedee logo was “Speedee Service System.”

The phrase summarized the operating method developed by Richard and Maurice McDonald after they redesigned their San Bernardino restaurant in 1948. They reduced the menu, standardized preparation, and arranged the kitchen for rapid production.

Speedee represented more than a character: he embodied the promise that customers would receive a consistent meal quickly. The system helped distinguish McDonald's from traditional drive-in restaurants, where larger menus and carhop service could make orders slower and less uniform.

The phrase is often confused with later advertising slogans such as “You Deserve a Break Today.” “Speedee Service System” was an operational brand message from McDonald's early history, while the later line was a consumer-facing advertising slogan.